Hodgdon H50BMG Rifle Powder 1LB. ContainerHodgdon H50BMG Extreme Extruded Powder for the . 50 BMG and Large Rifle Cartridges Hodgdon H50BMG is a large grained, slow burning extruded rifle powder developed specifically for the . 50 BMG cartridge and other large capacity magnum rifle cartridges. Part of Hodgdons Extreme Powder series, H50BMG delivers exceptional temperature stability maintaining consistent velocities across a wide range of conditions from cold Colorado mornings to warm summer